Minimizing Electromagnetic Interference When Powering Wireless Systems
EMI can be a difficult and frustrating problem for all electronic systems. If you walk into an RF laboratory and say, “I don’t know whether this DC/DC regulator’s EMI will disrupt or fail the operation of my system, but I have to design it now and test it later,” you’ll get sympathetic looks from your colleagues. Some will silently pray for you. RF systems designers are savvy engineers and, in many ways, masters in techniques to reduce conducted and radiated noise. They are intensely motivated and focused on eliminating potential sources of system noise, much as an angry bull focuses on the red cape in a bullfighting ring. Yet, the red cape sneaks up on you in mysterious ways in DC/DC switching regulators.
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